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{
"metadata": {
"name": "Ch 10"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 10: Power Amplifiers"
]
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 10.1 Page No.345"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Example 10.1\n",
"#Program to Determine the Transformer Turns Ratio\n",
"\n",
"#Given Circuit Data\n",
"RL=16 # Ohms, load resistance\n",
"RLd=10000.0 # Ohms ,effective load resistance\n",
"\n",
"#Calculation\n",
"import math\n",
"N12=math.sqrt(RLd/RL) #N12=N1/N2\n",
"\n",
"# Result\n",
"print \" The Transformer Turns Ratio is N1/N2\",N12,\":1\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
" The Transformer Turns Ratio is N1/N2 25.0 :1\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 10.2 Page No.345"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Example 10.2\n",
"# Determine the Effective Resistance seen\n",
"# looking into the Primary\n",
"\n",
"#Given Circuit Data\n",
"Rl=8.0 #Ohms, load resistance\n",
"N12=15.0 #N12=N1/N2, transformer turns ratio\n",
"\n",
"#Calculation\n",
"Rld=(N12)**2*Rl #effective resistance\n",
"\n",
"# Result\n",
"print \" The Effective Resistance seen looking into the Primary, Rld = \",Rld/10**3,\"k ohm\""
],
"language": "python",
"metadata": {},
"outputs": []
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 10.3 Page No.353"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Example 10.3\n",
"#(a)\n",
"# Determine the Second, Third & Fourth Harmonic Distortions \n",
"\n",
"#Given Circuit Data\n",
"#io=15*sin(600*t)+1.5*sin(1200*t)+1.2*sin(1800*t)+0.5*sin(2400*t)\n",
"#current in components 1,2,3,4\n",
"I1=15 #A\n",
"I2=1.5 #A\n",
"I3=1.2 #A\n",
"I4=0.5 #A\n",
"\n",
"#Calculation\n",
"D2=(I2/I1)*100 #percentage harmonic distribution of component 2\n",
"D3=(I3/I1)*100 #percentage harmonic distribution of component 3\n",
"D4=(I4/I1)*100 #percentage harmonic distribution of component 4\n",
"\n",
"#Result\n",
"print \" The Second Harmonic Distortion is, D2 = percent .\",D2\n",
"print \" The Third Harmonic Distortion is, D3 = percent .\",D3\n",
"print \" The Fourth Harmonic Distortion is, D4 = percent .\",round(D4,2)\n",
"\n",
"#(b)\n",
"import math\n",
"P1=1 #say\n",
"\n",
"#Calculation\n",
"D=math.sqrt(D2**2+D3**2+D4**2) #Distortion Factor\n",
"P=(1+(D/100)**2)*P1\n",
"Pi=((P-P1)/P1)*100\n",
"\n",
"#Result\n",
"print \"The Percentage Increase in Power because of Distortion is, Pi (in percent)= \",round(Pi,2)"
],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
|
